728 MR. SCLATER ON TWO BIRDS FROM COLUMBIA. [Nov. 18, 



B. The alveolar surface of the upper and lower jaws with a short 



ridye on the hinder part of each side. Nasals truncated, 

 straight. Peltastina. 



Gular plates short, separate. 



Toes 4.5. Upper beak three-toothed. Peltastes, Centro- 

 chehjs. 



Toes 4.5. Upper beak rounded, toothless. Chersinella. 



Toes 4.4. Testudinella. 

 Gular plates united, produced. Chersina. 



C. Alveolar surface of upper jaw narrow in front, triangular on 



the side, with a sharp edge on each side ; of the lower jaw 

 linear, narrow, with a sharp edge on each edge. Homopus. 



tt Sternum : front lobe covered with gular, subgular, and pectoral 

 plates, separated by a cross suture from the abdominal plates. 

 Alveolar process of upper and lower jaw with a sharp outer 

 edge. Pyxidina, Pyxis. 



II. Hinder part of dorsal disk separated from the rest by a more 

 or less perfect tranverse suture ; alveolar surface narrower, 

 of uniform width and a slightly raised edge on each side. 

 Kinixyina, Kinixys. 



EXPLANATION OF PLATE LX. 



Fig. 1. Xerobates gopher. 



2. Asterochelys radiata. 



3. Chelonoides tabulata. 



4. Chersinella graca. _ Alveolar processes of upper ncl lower 



5. Homopus areolatus. jaw of each genua. 



6. Chersina anyulata. 



7. Pyxis arachnoidcs. 



8. Kinixys crosa. , 



November 18, 1873. 



Dr. Giinther, F.R.S., V.P., in the Chair. 



Mr. Sclater exhibited and pointed out the characters of two new 

 species of birds obtained by Mr. Salmon during his recent expedition 

 to the State of Antioquia, Columbia. These were 



Chlorochrysa nitidissima, sp. nov. 



Supra nitide viridis, tergo cccrulescente ; pileo antico, capitis late- 

 ribus et interscapulio flavis : macula auricidari utrinque nigra : 

 alis caudaque nigris viridi limbatis : uropygii plumis paucis 

 aurantiaco terminatis : subtus ccerulescenti-viridis, ventre medio 

 nigro, gutture toto aureo-favo, hoc colore in collo in aurantiacum 

 transeunte : rostro et pedibus nigris: long, tota 5, alee 2'7, 

 cauda; l*7o, poll. A»gl. et dec. 



